@keyframes flipOutX {
    from {
        transform: perspective(400px);
    }

    30% {
        transform: perspective(400px) rotate3d(1, 0, 0, -20deg);
        opacity: 1;
    }

    to {
        transform: perspective(400px) rotate3d(1, 0, 0, 90deg);
        opacity: 0;
    }
}

.flipOutX {
    animation-name: flipOutX;
    backface-visibility: visible !important;
}
